The 2018 version of Smart 3D (v12.0) is a professional-grade software that is typically not available for direct public download. It is accessed through the Hexagon PPM Smart Community
SmartPlant 3D is a data-centric, rule-driven 3D design application specifically for plant and marine engineering. Unlike basic 3D modeling software, SP3D integrates a powerful database engine that allows multiple users to work on the same project simultaneously while maintaining data integrity. smart plant 3d 2018 download